5. The value of sin 50° - sin 70° + sin 10°:
???
Answers
Answered by
2
Answer:
sin50 -sin70 + sin10
by using component formula
-2cos60.sin10 + sin10
sin10 (1-2cos60)
sin10 (sin^2(30))
sin10 (1/4)
1/4 sin10
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Answered by
1
Answer:
Step-by-step explanation:
sin 50-sin 70+sin10=cos 40-cos20+cos80
=cos 80-cos 20 +cos 40
= -2sin30sin50 + cos 40
= -sin 50 + cos 40
= cos 40-cos 40
= 0
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